I could buy a complete T.P.I. system froma guy I know who parts them out for 350 bucks. I would add a super ram intake or build a custom single plane (torker 2 probably) reusing the injectors and fuel rails. Then two T60-1 turbos from ebay, some manifolds off the net or build my own, but can a tpi computer manage boost? and to how high? I'm thinking 12 psi non IC or 15-18 psi intercooled. obviously I would have to burn a new eprom, but that doesn't scare me at all. Actually I'm really looking forward to jumping into tuning.

If the stock computer won't work who makes an afordable aftermarket computer that plugs into our factory wiring?

sorry if theis wasn't the best place for this I guess maybe it could have been in the tpi area???

 

You will want to upgrade to the Syclone computer (749?) Do a search on the wiring changes. It is rather well documented.

You might also want to got to the Power Adder section for pointers from guys more experienced than I am in that arena.

 

I've been to hell and back with tpi. here is my suggestion..

1) Pump, stock wont do, so might as well get a good walbro
2) TPI rails / injectors wont do, so get the HSR or something
3) you'll repin harness anyway, so get aftermarket, make one,
or ebay
4) Prolly wont be impressed with stock TB anyway.

So all in all. You'll spend 300 bucks for a $25.00 junkyard ecm, and a pile of crap you wont use.

-- Joe

 

yes, If you repin a few connector wires the "stock" map (90-92) (730ecm) then yes the comp. with the proper tunning (and $58 format) will work with boost. if you don't belive me do a search. try ($58 730)

also as stated the fuel pump won't feed enough fuel, will have to figure out your expected hp and get the right fuel injectors

BTW $350 for a tpi setup is on the high side. if you are going to use a aftermarket setup for your intake then go get the $25 junkyard ecm as stated above and pick up a wiring harness someware else (even that HIGH $$$ e-bay would be cheaper) and get the gm memcal. for under 200.00 you have what you are really after and if you really shop around you can get the (ecm, memcal for 90-92 tpi and wireb harness for under 100.00)

then just get the other stuff like intake setup, fuel injectors and fuelpump

 

if i buy the whole setup i can go ahead and get the efi up and running and start playing with tuning.

I know I will have to up the injectors and rails and regulator and all that stuff, I just wasn't sure about the ecm being able to control boost.

Explain this a little bit better:

yes, If you repin a few connector wires the "stock" map (90-92) (730ecm) then yes the comp. with the proper tunning (and $58 format) will work with boost

repin meaning a lilttle wire splicing? stock map (manifold absolute pressure sensor??) so would a 85-89 MAF work??? What do you mean by "yes the comp" and is "$58 format" simply a 58 dollar format or is the dollar sign some code thing. And what is the GM memcall?

I also don't plan to use the tpi manifold I'm thinking of using the holley stealth ram or I'll make one out of a single plane...victor maybe? I guess some guys on here still want to see that done still.

 

A '90-'92 speed density TPI harness (originally for a 1227730 ECM) can be repinned to work either with an actual 1227749 ECM, or with a 1227730 running the '749s program code.

Not necessarily any splicing, basically just rearranging some wires (i.e. terminal pins) within the existing connectors. A MAF harness can be converted to speed density quite easily, too. (more repinning, adding one new connector, and about four extra wires)

Comp, I believe he means computer, i.e. ECM.

$58 is the Syclone/Typhoon style of turbo computer code ($58 actually being the Mask ID, that identifies it when you read the chip). The dollar sign is used to indicate a number in hexidecimal. $8D is the Mask ID for regular ol' speed density TPI code.

Much of this has been discussed previously, between the "sticky" posts, and the search function, you should be able to find more detail on anything that is still unclear. At least for the basic stuff.
As to "what is a MEMCAL", check out the sticky posts on the DFI & ECM forum.

HTH,

 

thanks a bunch I'll keep you up to date When I start the EFI swap, and hopefully I'll have a few turbos sitting in the garage this winter. Shortblock will be the killer with money, Forged parts If i can get that done I can easily build the rest. May just use the cast type 500hp eagle stuff W/ TBC on the pistons...But I only like to do stuff ONCE, so we'll see

thanks again